Gearing.



No. 69|,59l. Patented 1an. 2|, |902. A.,T. BnowN. GEAmuG, (pli'ccion medim 2, 1901.) (No Model.)

In!" y K A I ATTORNEYS` UNITED STATES a PATENT OFFICE.

ALEXANDER T. BROWN, OF SYRACUSE, NEV YORK.

GEARING. l

SBECFICATIQN lforming part of Letters Patent'No. 691,591, dated January21, 1902.

Application filed January 2, 1901. Serial No. 41,817. (No mcdelJ To @ZZwhom t may concern:

Be it known that I, ALEXANDER T. BROWN, of Syracuse, in the county ofOnondaga and State of New York, haveinvented certain new andusefullmprovementsin Gearing,of which the following is a specification.V

This invention has for its object the production'of a gear popularlyknown as a differential or compensating gear which is pario ticularlysimple in construction, economical in manufacture, and highly efficientand durable yin use; and to this end it consists in the devices andcombinations hereinafter set forth and claimed.

Figure 1 is a face view of my differential gear, the alined shafts beingremoved. Figs. 2 and 3 are sectional views taken, respec- ,tively, onlines 2 2 and 3 3, Fig. l, the alined shafts being shown in position inboth views 2o and one section of the power-transmitting member beingremovedl in Fig. 3. Fig. 4 is a face view of one of the detachedsections of the power-transmitting member of my differential gear, thepinions being shown in position Within said section. Fig. 5 is anisometric View of the sleeve for connecting contiguous sides 'of thegear-n heels fixed to the two alined shafts.

Y My differential gear comprises, essentially,

3o two alined shafts A and B, two gear-wheels C and D, apower-transmitting member E, and pinions F. The shafts A and B are ofany desirable form, size, and construction, being here illustrated asarranged end to end. It will be obvious, however, that one of saidshafts may consist` of a sleeve encirclinga part of the other shaft. Thegear-wheels C and D are preferably spur-gears, are respectively fixed tothe shafts A and B, and are 4o usually disposed side by side andprovided with hubs cand d, projecting from their outer side faces, andadditional hubs or cylindrical surfaces c and d', projecting from theirinner or adjacentside faces and having their contiguous end facesengaged with each other, as seen in Fig. 2. Said hubs c and d aregenerally inclosed by a sleeve D', interposed between the main bodies ofthe spur-gears C and D and closely fitting said hubs and hav- 5o ing itsend faces engaged withannular faces c? and d2, provided on the mainbodies of said gears C and D at the bases of the hubs c" and.

d. The sleeve D' tends to prevent lateral springing or movement of theends of the shafts A and B and adds to the practicability and durabilityof my differential gear.

The power-transmitting member E usually consists of a hollow case whichsubstantially incloses the gear-wheels C and D, is composed of separablesections e and e', united together by suitable fastening means e2, andis provided with opposite side walls and with a peripheral wall providedwith a braking-surface `e, one of the side walls being fixed to oneendof the peripheral Wall and comprising,

with said peripheral wall, the section e, and' the othei` side wallbeing formed with sprocketteeth e3 and comprising the section e. Saidpower-transmitting member E is arranged concentric with the gears C andD, is disconnected from the sleeve D', is movable inde-v pendently ofsaid gears and sleeve, and is loosely mounted on the hubs c and d, itsopposite side walls having their central portions provided withopenings, which receive andL closely lit the hubs c and d. The outerfaces ofthe opposite side Walls of the power-transmitting 4member areseparated a less distance thanihev end faces yof the hubs c and d, andconsequently said hubs project outwardly beyond the outer faces of saidopposite side .walls for receiving suitable fastening means,

as pins a and b, passed diametrically through the hubsc and d and theshafts A and B at the outside of the 'side walls of thepowertransmittingmember. The inner faces of the opposite side walls of thepower-transmitting member are formed with inwardly-extending hubs 'oranges e5, having their internal faces engaged with the hubs o and d andtheir end edgesengaged with annular faces c3 and ci?, provided on thegears C and D at the bases of the hubs vc and d. Said hubs or Iianges e5l@ afford a large bearing-surface for the powe,r"

spindlesf', presently described. The inner face of said section c of thepower-transmitting member E is also provided with a recess e6 forreceiving the contiguous end of the section e of the member E, theperipheral wall of said recess forming a tiange, which projects from theinner face of the section e, is lapped upon the contiguous portion ofthe periphery of the section e, and serves to conceal and protect thejoint between said sections e and e.

The pinions F are arranged one in advance of the other within thepower-transmitting member E and concentric with the parts A, B, C, D,and E, previously described, in substantially equidistant pairs, withtheir axes parallel with the axes of said parts, are interposed betweenthe sleeve D and the peripheral wall of the hollow power-transmittingmember E, and are supported at opposite ends by the opposite side wallsof the member E. One end of each pinion of each pair of said pinions isengaged with one of the spur-gears C and D, and the opposite end of saidpinion is engaged with the other pinion of said pair of pinions and isgenerally provided with a hubf, formed of less diameter than the toothedface of said pinion and alined with the other spur-gear. Said pinionsare preferably mounted on spindles f', disposed substantially parallelwith the axes of the shafts A and B and having corresponding extremitiesliXed in openings extending through the inner and on ter faces of one ofthe side walls of the power-transmitting member E and their otherextremities detachably arranged in openings extendingthrongh the innerand outer faces of the opposite side wall of said member E. Thespindlesf are provided with lengthwise oil containing chambers f3,extending inwardly from corresponding ends thereof and formed withclosed inner ends, and are also provided with exit-passages leading fromthe chambers f3 through the peripheries of the spindles and plugs f4,which close the outer ends of the chambers f5 and are formed withperforations extending through their inner and outer faces. Saidspindlesf strengthen the powertransmitting member and form aparticularly strong, durable, and effective means forsupporting thepinions F.

In the use of my invention the power-transmitting member E drives bothshafts A and B land both shafts rotate in the same direction or inreverse directions.

The construction and operation of'mygear will be readily understood uponreference to the foregoing description and the accom panying drawings,and it will be obvious to those skilled in the art that more or lesschange may be made in the construction and arrangement of its partswithout departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

l. In a differential gear, the combination of two alined shafts arrangedend to end, two spur-gears disposed side by side and fixed respectivelyto the shafts, said spur-gears having their inner side faces providedwith projeeting hubs, a sleeve interposed between the main bodies of thespur-gears and closely fitting said hubs, a hollow power-transmittingmember disconnected from the sleeve and arranged `concentric with theshafts and the sleeve and formed with opposite side walls at the outersides of the peripheral faces of the spur-gears, and a pair of pinionsinterposed between the sleeve and the peripheral wall of the hollowpower-transmitting member and having their ends supported by the sidewalls of the power-transmitting member and their axes disposedsubstantially parallel with the axes of the shafts, said pinionsbeingengaged with each other and respectively engaged with the spur-gears,substantially as and for the purpose described.

2. In a dierential gear, the combination of two alined drivenshaftsarranged end to end, two spur-gears disposed side byside and fixedrespectively to the shafts, said sp u r-gears having their inner andouter side faces provided with projecting hubs, the end faces of theinner hubs being engaged with each other, a sleeve closely iitting theinner hubs of the spur-gears and havingits end edges engaged with innerside faces of the main bodies of the spur-gears, a hollowpower-transmitting member for driving both shafts, said member beingdisconnected from the sleeve and arranged concentric with the shafts andthe sleeve and formed with opposite side walls loosely mounted on theouter hubs of the spur-gears, and a pair of pinions interposed betweenthe sleeve and the peripheral wall of the hollow power-transmittingmember and having their ends supported by the side walls of thepower-transmitting member and their aXes disposed substantially parallelwith the axes of the shafts, said pinions being engaged with each otherand respectively engaged with the spur-gears, substantially as and forthe purpose described.

3. In a differential gear, the combination of two alin ed driven shaftsarranged end to end, two spur-gears disposed side by side and fixedrespectively to the shafts, said spur-gears having their outer sidefaces provided with pro- IOO IIO

jecting hubs, a hollow poner-transmittingl member for driving bothshafts, said member being arranged concentric with the shafts and formedwith opposite side walls loosely mounted on said hubs of the spur-gears,and having their inner faces provided with inwardlyextending hubsloosely mounted on said hubs of the spur-gears and engaged with outerside faces of the main bodies of the spurgears, and a pair of pinionshaving their ends supported by the side walls of the powertransmittingmember and their axes disposed substantially parallel with the axesofthe shaf ts, said pinions being engaged with each other andrespectively engaged with the spurgears, substantially as and for thepurpose specified.

4. In a differential'gear, the combination of two alined shafts arrangedend to end, two spur-gears disposed side by side and fixedJ respectivelyto the shafts, said spur-gears having their inner side faces providedwith projegting hubs, a sleeve interposed between the main bodies of thespur-gears and closely fitting said hubs, a hollow power-transmittingmember disconnected from the sleeve and arranged concentric with theshafts and the sleeve, said power-transmitting member being formed withopposite side walls at the outer sides of the peripheral faces of thespurgears having their inner faces provided with inwardly-extending hubsengaged with outer side faces of the spur-gears, and a pair of pinionsinterposed between the sleeve and the peripheral wall of the hollowpower-transmitting member and having' their ends supported by the sideWalls of the power-transmitting member and their axes disposedsubstantially parallel with the axes of the shaft-s, said pinions beingengaged with each other and respectively engaged with the spurgears,substantially as and for the purpose specified.

`5. In a dierential gear, the combination of two alined driven shaftsarranged end to end, two spur-gears disposed side by side and lixedrespectively to the shafts, said spur gears having their inner and outerside faces provided with projecting hubs, a sleeve closely fitting theinner hubs of the spur-gears and having its end edges engaged with innerside faces of the main bodies of the spur-gears, a hollowpower-transmitting member for driving both shafts, said member beingdisconnected from the sleeve, arranged concentric with the shafts andthe sleeve and formed with opposite side walls loosely mounted on theouter hubs of the spur-gears and having their inner faces provided withinwardly-extending hubs loosely mounted on said outer hubs of thespur-gears and engaged with outer side faces of the main bodies of thespur-gears, and a pair of pinions interposed between the sleeve and theperipheral wallffof the hollow power-transmitting member` and havingtheir ends supported by the side walls of the powertransmitting memberand their axes disposed substantially parallel with the axes of theshafts, said pinions being engaged with each other and respectivelyengaged with the spurgears, substantially as and for the purpose setforth. v

6. In a differential gear, the combination of two alined shafts arrangedend to end, two spur-gears disposed side by side and'fixed respectivelyto the shafts, a hollow power-transmitting member arranged concentricwith the shafts and formed with a'peripheral wall and opposite sidewalls disposed at the outer sides of the peripheral faces of thespur-gears, one

of the side walls being separable from the corresponding end of theperipheral wall and being formed with a toothed periphery and spectivelytothe shafts, a hollow power-transmitting member arranged concentricwith the shafts and formed with a peripheral wall and opposite sidewallsvdisposed at the outer sides of the peripheral faces of thespur-gears, the peripheral wall being xed at one end to one of the sidewalls, and the opposite side wall being separable from the other end ofthe peripheral wall, and being formed wit-h a toothed periphery and aflange projecting from its inner face and lapped upon the contiguousportion of the periphery of said pe'- ripheral wall, and a pair ofpinions having their ends supported by the side Walls of thepower-transmitting member and their axes disposed substantially parallelwith the axes of the shafts, said pinions being engaged with each otherand respectively engaged with the spur-gears, substantially as and forthe pur-k pose described.

8. In a differential gear, the combination of two alined shafts arrangedend to end, two spur-gears disposed side by side and fixed respectivelyto the shafts, a hollow power-transmittin g member arranged concentricwith the IOO shafts and formed with a peripheral wall and opposite sidewalls disposed at the outer sides of the peripheral faces of thespur-gears,

one of the side walls being formed with opensions, and the opposite sidewall being separable from the other end of the peripheral wall andprovided with-a toothed periphery, openings extending through its innerand outer faces and a flange projecting from its inner face and lappedupon the contiguous portion of the peripheryof said peripheral wall, apair of spindles disposed substantially parallel with the axesvoftheshafts and having corresponding extremities fixed in the openings inone of the side walls of the powertransmitting member ,i and theirlother extremities detachably arranged in the openings in the oppositeside wall of said member, pinions mounted on the spindles and projectingbetween said extensions and engaged with each other and respectivelyengaged with the spur-gears, and means for securing the separable sidewall to said extensions independ- IIO ently of the spindles,substantially as and for the purpose specified.

9. In a dierential gear, the combination of two alined shafts, a hollowpower-transmiting member arranged concentric with the shafts and havingopenings in opposite walls, two spur-gears mounted respectively on theshafts within the hollow power-transmitting member and having theiradjacent sides provided With hubs and annular faces at the bases of thehubs, said gears having their outer sides provided with hubs projectingthrough said openings beyond the outer faces of said walls of thepower-transmittingmember, a sleeve engaging the peripheries of the hubsand having its end edges engaged with the annular faces, fasteningmembers engaged with the shafts and the projecting ends -Veach other andrespectively engaged with the spur-gears, substantially as and for thepurpose set forth.

In testimony whereof I have hereunto signed my name, in the presence oftwo attesting witnesses, at SyracuseJn the county of Onondaga, in theState of New York, this 22d day of December, 1900.

ALEXANDER T. BROWN. Witnesses:

S. DAvIs, D. LAVINE.

